There's inadequate data accessible to assess efficacy of propoxyphene together with acetaminophen in sufferers with chronic agony.Dying can happen within just one hour of having an overdose of Darvocet-N (propoxyphene napsylate and acetaminophen) . Lots of the deaths that happen in folks who get Darvocet-N (propoxyphene napsylate and acetaminophen)